Question about 2000 GMC New Sierra 1500
Yes bad o-ring seal in the fuel pressure regulator could be the problem causing the loss of fuel pressure. Also bad o-rings on injectors can also cause loss of fuel pressure.Also check the FPR itself.If fuel pressure regular is faulty,then also there will be loss of fuel pressure. Also check for leak at injectors:-- What you do to check for an injector leak is pressurize your fuel system (key on) with a fuel pressure guage attached to the service port. Then close both valves on the return and feed block off lines and monitor your guage. If the system keeps pressure you know that injectors are ok and the problem may be down stream (fuel pump or fpr). On the flip side, if it didn't hold pressure then it could be an injector or an fpr leaking into the vacuum line. To check the fuel pump, presurize the fuel system and only block off only the return line. If it holds pressure then you know the the fuel pump is ok and the problem may be with the fpr. If you loose pressure, the pump check valve is bad and you need a fuel pump. To check the fpr, pressurize the system and then block off only the feed line. If the system holds pressure then the fpr is ok. If you loose pressure then the fpr is allowing fuel to pass into the return line. In that case you have a bad fpr. ------------ Try this tests and possibilities to confirm the fault.This should help.Thanks.Helpmech.
Posted on Jan 02, 2011
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Feb 27, 2014 | 1988 Ford F 150
Apr 21, 2013 | 2002 Chrysler Town & Country
Feb 01, 2013 | 2002 Pontiac Montana
Dec 01, 2012 | Cars & Trucks
Oct 17, 2012 | 2000 Acura TL
May 28, 2009 | 2002 Cadillac Escalade
Apr 29, 2009 | 2002 Dodge Intrepid
Mar 31, 2009 | BMW 3 Series Cars & Trucks
162 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: